Declension table of ?niravyaya

Masculine	Singular	Dual	Plural
Nominative	niravyayaḥ	niravyayau	niravyayāḥ
Vocative	niravyaya	niravyayau	niravyayāḥ
Accusative	niravyayam	niravyayau	niravyayān
Instrumental	niravyayeṇa	niravyayābhyām	niravyayaiḥ niravyayebhiḥ
Dative	niravyayāya	niravyayābhyām	niravyayebhyaḥ
Ablative	niravyayāt	niravyayābhyām	niravyayebhyaḥ
Genitive	niravyayasya	niravyayayoḥ	niravyayāṇām
Locative	niravyaye	niravyayayoḥ	niravyayeṣu

Compound niravyaya -

Adverb -niravyayam -niravyayāt